Results 231 to 240 of about 63,591 (249)

Workshop FR-AM-4: Measurement techniques for lightning currents indirect measurement of lightning peak currents using far fields and LLSs

2017 IEEE International Symposium on Electromagnetic Compatibility & Signal/Power Integrity (EMCSI), 2017
• Estimation of lightning peak currents from remote peak fields is possible, but only within limited accuracy (~ ±20%) • Variations in return stroke velocity, field propagation effects, height of striking point have some effect on the accuracy of obtained value • This needs to be considered when using LLS estimated peak currents for failure analysis (e.
Gerhard Diendorfer, Farhad Rachidi
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Lightning current measurements on real installations by a mobile measurement system

2010 30th International Conference on Lightning Protection (ICLP), 2010
For decades measurements of real lightning currents have been performed for basic scientific research on lightning current test fields all over the world. Based on the scientific background of these measurements the measuring systems used for this research is highly sophisticated and rather complex.
Josef Birkl, Thomas Bohm, Peter Zahlmann
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Assessing currents of upward lightning measured in tropical regions

Atmospheric Research, 2014
Abstract Negative upward lightning events in tropical regions are discussed based on the records of six currents measured recently at a short instrumented tower in Brazil. Only one event exhibited a return stroke following the initial stage. According to available correlated records of electric-field change, all events were triggered by nearby ...
Miguel Guimarães, Listz Araujo, Clever Pereira, Claudia Mesquita, Silverio Visacro   +4 more
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On remote measurements of lightning return stroke peak currents

Atmospheric Research, 2014
Abstract Return-stroke peak current is one of the most important measures of lightning intensity needed in different areas of atmospheric electricity research. It can be estimated from the corresponding electric or magnetic radiation field peak. Electric fields of 89 strokes in lightning flashes triggered using the rocket-and-wire technique at Camp ...
S. Mallick, V.A. Rakov, D. Tsalikis, A. Nag, C. Biagi, D. Hill, D.M. Jordan, M.A. Uman, J.A. Cramer   +8 more
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Modelling of measured lightning discharge currents to tall towers

2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), 2017
Lightning discharge currents and their derivatives have been measured at instrumented tall towers for a few decades already. Results of those measurements are used for lightning research purposes, modelling of lightning discharges and making improvements in lightning protection.
Vesna Javor, Dario Javor, Karl Lundengard, Milica Rancio, Sergei Silvestrov   +4 more
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The Lightning Current Measurement Based on Wavelet Transform

Advanced Materials Research, 2012
The current model of the lightning process is established and simulated in this article, and aiming at the disadvantage that the hardware filtering de-noising method adopted in the general lightning measurement system can not effectively separate signals and noises in same one frequency channel, this article uses the wavelet transform to replace the ...
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Metrological Assurance of Measurements of Pulsed Lightning-Strike Currents

Measurement Techniques, 2016
Metrological assurance of instruments for measuring high-power pulsed lightning-strike currents is considered. Data on new types of measuring instruments that function in the range up to 200 kA, the calibration of which is traceable to the GET 202–2012 State Primary Special Standard of the unit of pulse current of lightning discharges in the range from
K. Yu. Sakharov, V. A. Turkin, O. V. Mikheev, V. L. Ugolev, M. Yu. Denisov, A. V. Sukhov   +5 more
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Application of insulation technology in tower lightning current measurement

2019 11th Asia-Pacific International Conference on Lightning (APL), 2019
Tower triggered lightning observation is one of the most important ways to measure lightning current waveforms. Scientists in many countries have built the lightning current measurements on high towers or high buildings lightning observations, their work form the cornerstone of lightning protection and natural lightning research.
Yuexin Yang, Zilong Qin, Zongxu Qiu, Mingli Chen, Hongbo Guo, Ran Cai   +5 more
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Full-waveform measuring system for lightning current caused by lightning strikes to tall structures

Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402), 2002
In order to protect electronic devices against the effects of lightning strikes to tall structures, detailed information about the lightning currents are necessary. For this purpose, a full-waveform measuring system was set up on the north towers of Jiangyin Highway Bridge.
null Gao Cheng, null Shi Lihua, null Chen Bin, null Zhang Gongcheng, null Zhou Bihua, null Chen Ziming   +5 more
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Direct measurement of lightning current through a wind turbine generator structure

Electrical Engineering in Japan, 2004
The development of a wind turbine generator system in Japan is regarded as a promising source of clean energy, and its popularization is rapidly increasing. In Japan, there are many wind turbine generator systems installed on the Sea of Japan coast, with large wind capacity.
Yasuhiro Shiraishi, Takahiro Otsuka
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